moscow where he was supposed to meet one-on-one with vladimir putin, and the new tensions exist over nsa leaker, edward snowden, and the white house now saying the president will instead travel to sweden, and last night president obama said terrorists depend on us being terrorized, but we are going to live our lives. president obama made his first comments about the threat. >> it's significant enough that we are taking every precaution, and it's a reminder, that in all the significant steps we have made that this radical violent extremism is still out there, and we have to stay on top of it. >> we would not say whether the nsa surveillance programs tipped the u.s. off on it. >> i think the general rule is to snow common sense and use caution. >> what i say to them and what i say to president putin, is that's the past, you know, and we have got to think about the future. >> the president insisted he will attend the g-20 summit next month. >> if russia wants to uphold the olympic spirit, then every judgment should be made on the track or in the swimming pool or on the balance beam, and peo